Which of the following statements are true about Radio frequency (RF) waves? Each correct answer represents a complete solution. Choose all that apply.

A.
They are a subset of electromagnetic waves.

B.
They have a frequency of 3 KHz to 300 GHz.

C.
They have a wavelength of 100km to 1mm.

D.
They have a frequency of 300 KHz to 3 GHz.

E.
They travel at the speed of light.

F.
They have a wavelength of 10km to 1mm.